"We
are quite excited to have Charlize, Chan, Joe and Dan join us on the
show," said telecast producers Craig Zadan and Neil Meron. "We
are happy to feature them as special guests in our production."

This
will be Gordon-Levitt, Radcliffe and Tatum's first time appearing
on the Oscar show.

Theron
won an Oscar for her leading role in "Monster" and received her
second nomination for her leading role in "North Country" (2005).
Theron starred in 2012's "Prometheus" and "Snow White and the
Huntsman."

Tatum,
who starred in five films of 2012, including "Magic Mike," "21
Jump Street" and "The Vow," will next be seen in "Side
Effects," out this week, and "White House Down," due out this
summer.

Gordon-Levitt
had a very busy year, with roles in "Dark Knight Rises," "Looper"
and the Best Picture nominee "Lincoln." He most recently starred
in "Don Jon's Addiction," which he also wrote and directed, and
which premiered at Sundance last month.

Radcliffe
starred as the title character in the "Harry Potter" series,
which is the highest grossing film series of all time. In 2012 he
starred in "The Woman in Black," and this year will be seen in
"Kill Your Darlings," "Horns" and "The F Word."

Oscars
for outstanding film achievements of 2012 will be presented on "Oscar
Sunday," Feb. 24, at the Dolby Theatre at Hollywood & Highland
Center, and will be hosted by Seth MacFarlane live on the ABC
Television Network. For more information, go to Oscar.com
or download the official Oscars app.